Chair



Dec. 18, 1928. 1,696,153

E. D. BUMP CHAIR Filed Aug. I6. 1924 2 Sheets-Sheet 1 Dec. 18, 1928. 1.696.153

E. D. BUMP CHAIR Filed Aug. 16, 1924 2 ShBQtS-SIISM. 2

. Patented Dec. 18, 1928.

UNITED STATES EDWARDIJ. BUMP, or LAKEWOOD, OHIO, AssreNoa'ro THE BETTCI-IER STAMPING &

PAT'ENT *oFF cE;

, MANUFACTURING COMPANY, OF CLEVELAND, OHIO, A CORPORATION OF OHIO. T

CHAIR.

Application filed August 16, 1924. Serial No. 732,444.

This invention relates to chairs of the type used by typewriter operators, wherein the back standard is adjustably connected with and supported by arms extending rearwardly from beneath the seat.

i Inthe class of chairs referred to, it has been customaryto employ two adjustments forthe purpose of varying the inclination of the back post or standard as well as for varying the vertical position of such standard; and one of the customary means for providingfor such vertical ad ustment is by slotting the lower end of thestandaid and passing a bolt through the slot, the said boltserving to secure the standanl in any vcrtical position to which it may be adjusted.

It is the general purpose and object of my invention to "provide chairs of this type with means whereby the back post or standard may be adjusted, both angularly and vertically, and may be secured in such "adjustedposition by Lil single operation. A furtherobject of the invention is to enable the vertical adjustment to be obtained without the necessity for slotting the post or standard.

Other objects and advantages of the invention. will appear hereinafter and the novel features willbe particularly pointed out ,in the claims.

Referring to the drawing, Fig. 1 represents a side elevation'of a part of a chair of the type referred to having my invention applied thereto; Fig. 2 isa longitudinal sectional view taken between the rear portions of the supporting arms, withthe bottom of the post or standard in elevation, and showing the manner of securing the latter in place; Fig. 3 is a detail in section corresponding to the line 3-3 of Fig. 2; Fig. 4 a. detail in perspectiveof the front locking and clamping member; Fig. 5 a similar view of the vertically movable lock-operating member; Fig. 6 a similar view of the cooperating locking member which engages the front locking plate; and Fig. 7 a similar view of the inclined plate with which the lock-operating member cooperates.

Describing the variousparts by reference characters, 1 denotes the seat supporting postand 2 a yoke on top of the post to the sides of which the brackets 3 are secured, the said brackets supporting the seat 4.

5 denotes the rearwardly-extending backsupporting arms, which may be themselves means of pivot pins 6 securing the same to opposite sides'of the yoke2, the up-anddown movements of the arms being limited by a slot; 7 at the-front ofgeach arm-1 and a pin 8 extending through each slotand anspring (not shown), each bearing projecting into a V-shapednotch 10 in an. arm 5.

The detailsroi the manner of mounting the arms 5 form no art of, the invention intended to be covered hereby; but indicate the'best form inwhich I.have'contemplated mounting the arms. 5, the details being shown and described at length in the patent issued to Clifford H. Peters and myselfon July 15, 1924, No. 1,501,181.

Extending between the rear ends of the arms 5 is a rear abutment member 11, the same .being a plate with central lugs 12 mounted in slots 18 in said arms, the opposite side walls of each slots being convex and the top and bottom of each slot being concave to permit the rocking of the lugs 12. The plate 11 is adapted to engage and bear against the back of the back-supporting post or standard 14. Cooperating with the plate 11 is a front abutment member, the same being a .plat'e'15 having center lugs 16 projecting from the side edges thereof, the

lugs being slidably and rotatably mounted in elongated slots. 17 in the arms .5- The plate '15 is adapted to engage and. bear against the front of the standard lit-and is provided "at each lateral edge with a forwardly projecting flange 18, each flange having a convex central portion providedwith serrations 19, which serrations are adapted to be engaged by a locking'member which holds the plate many angular position 'to which it may be adjusted, as well as the plate 11-. i i i The locking member referred to is ehannel-shaped, the web being indicated at 20 and the flanges at 21. i This locking member is arranged between the arms 5 and is rovided with lugs 22 which are-mounte in elongated slots 23 in said arms, whereby the locking member may be moved rearwardly toward the serrations 19' bymeans of the operating member, which will now be de scribed;

supported in any convenient manner, as by,

llil) The member which operates the locking member 20, 21 is shown in detail in Fig. and comprises a horizontal top 24 and a vertical rear wall 25 which is adapted to engage the web 20. Projecting forwardly from the rear wall 25and downwardly from the top 2% are the side walls 26 each having its front edge downwardly and rearwardly beveled, to engage the correspondingly beveled or inclined plate 27 which is mounted between the arms 5,-being supported therein by lugs 28 extending through anchoring slots 29 insaid arms. At the bottom, the plate 27 is provided with a rearwardly extending flange 30 which is provided with a central slot 31. The lower wall of the flange 30, adjacent the slot 131, is adapted to engage the head 32 of a screw bolt 33, the upper end of which is threaded into an aperture 24: in the top of the plate on the flange 24.

lVith the parts constructed and arranged as described, the post or standard 14 will be supported by and between the plates 1.1 and 15 and the interposed portions of the arms 5 by the thrustof the plate 15 toward the plate 11, such thrust being imparted by setting up the screw bolt 33 thereby to force the operating member 24:-26 rearwardly, which in turn forces the locking member E2021 rearwardly against the serrated flanges of the plate 15 and thrusts the said plate toward the plate 11.

\Vhen it is desired to change either the angular or the vertical position of the post or standard 14 or both, it is necessary only to slack off the screw bolt 33, which will force the operating member upwardly and forwardly, releasing the locking member from the serrations 19 and enabling the standard to bemoved vertically and the plates 11 and 15 to be rocked, if desired, to any angular position. After such operation, the post or standard 14 will be locked in its adjusted position by merely setting up the bolt 33.

By the means shown and described herein, a simple and effective structure is provided for mounting, vertically adjusting, rocking or rotating the back standard of a chair of the general type referred to, and locking the standard in such adjusted position. The parts which are employed for securing such locking and adjustment can be cheaply and conveniently made of pressed or stamped and punched sheet metal; the post or standard maybe locked in the position in which it is placed after both a vertical and rotary adjustment by the operation of a single member-the screw bolt 33and without the necessity for slotting the post or standard.

Having thus described my invention, what I claim is:

1.' In a chair, the combination, with opposite rearwardly-disposed arms, of a back post interposed between and vertically adjustable nith respect to said arms, and means for securing the said post in adjusted position between said arms, the said means con'iprising a member adapted to en gage the rear of said post and mounted to rock between said arms, a cooperating member pivotally supported by and between the said arms and adapted to engage the front of said post, and means for forcing one of the said members toward and from the other, thereby to secure the said post in adjusted position.

2. In a chair, the combination, with opposite rear ardly-disposed arms, of a back post interposed etween and vertically adjustable with respect to said arms, and means for securing the said post in adjusted position between said arms, the said means comprising a member adapted to en age the rear of said post, a cooperating mom or pivotally supported by and between the said arms and adapted to engage the front of said post, and means for moving the second memier along its pivotal support toward and from the first member, thereby to secure the said post in adjusted position.

3. In a chair, the combination, with opposite rearwardly-disposed arms, of a back post interposed between and vertically adjustable with respect to said arms, and

means for securing the said post in adjusted position between said arms, the said means comprising a member adapted to engage the rear of said post and pivotally mounted in said arms, a cooperating member adapted to engage the front of the post and also pivotally mounted in said arms, one of the said members being movable on its pivotal support toward and from the other, and means for so moving such movable member thereby to lock and unlock the said )ost between the said arms and the said mem ers.

4:. In a chair, the combination, with opposite rearwardly-disposed arms, of a back post interposed between and vertically adjustable with respect to said arms, and means for securing the said post in adjusted position between said arms, the said means comprising a member pivotally supported by and between said arms adapted to. engage one portion of said post, a cooperating member adapted to engage the opposite portion of the post and pivotally supported by and between said arms, one of the said members being movable toward and from the other, and means for so moving such menr ber thereby to lock and unlock the said post between the said arms and the said members.

5. In a chair, the combination, with opposite rearwardly-disposed arms, of a back post interposed between and vertically adjustable with respect to said arms, and means for securing the, said post in adjusted position between said arms, the said means comprising a member adapted to engage a portion of said post'andxpivoted to and between said arms, a second member independent of the first member andadapted to engage the opposite portibrii-of ,the' postand havin a fore-and-aft sliding pivotal connection w th Saidarms, and means for forcingthe second menibertowa'rd'and from the first member thereby tolock and unlock the said post between the said arms and the said mom bers.

6. In a chair, the combination, with opposite rearwardly disposed arms, of a back post interposed between and vertically adjustable with respect to said arms, and means for securingthe said post in adjusted position between said arms, the said means ward and from the first member thereby to lock and unlock the said post between the said arms and the said members. 7

7. In a chair, the combination, with opposite rearwardly-disposed arms, of a backsupporting post interposed between and vertically adjustable with respect to said arms, a rear plate pivotally connected to said arms and engaging the rear of the post, a front plate pivotally and slidably mounted within said arms and adapted to engage the front of the post, and means-mounted between the said arms for moving the' second plate toward the firstplate, thereby to clamp the post or standard in its vertically and angularly adjusted positions with respect to said arms. a

8. In a chair, the combination, with opposite rearwardly-disposed arms, of a backsupporting post interposed between the said arms, a rear engaging member for the post pivoted between said arms, a front-engagin; member for the post also pivoted between said arms and movable toward and from the first-mentioned member, a combined locking and operating device interposed between said arms, and means for moving thesaid device into engagement with, the seeond member thereby to force it toward the first member.

9. In a chair, the combination, with opposite rearwardly-disposed arms, of a bachsu iiporting post interposed between the said arms, a rear engaging memberfor the post between said arms, a front-engaging member for the post pivoted between said arms and movable toward and from the firstmentionedmember, a combined locking and operating device interposed between said arms, and means for moving the said device into engagement with the second member thereby to force it toward the first member.

positti' rearwardly disposed arms, of a b'ac 10; In a chair, the coiiibiiiation, wfith up gage the said serrations, an operating mem ber for the locking member, an inclined support for the operating member interposed between the arms andadapted to be engaged by the operating member, and a bolt threaded into the operating member.

11. In a chair, the combination, with opposite rearwardly-disposed arms, of a backsupporting post interposed between said arms, a rear-engaging member for the said post between said arms, a front-engaging member for the post pivoted between the arms and movable toward and from the first- .inentioned member, a locking member slidably mounted between the said arms and adapted to engage the second member, an operating member for the locking member, an inclined support for the operating member carried by the arms and adapted to be engaged by the operating member, and means for moving the said operating member along said support.

12.,Ina chair, the combination, with opposite rearwardly-disposed arms, of a backsupporting post vertically adjustable between the said arms, a rear engaging mem ber between the said arms and about which said post is adapted to swing, a plate adapt ed to engage the front of the post and having pivots slidably mounted in said arms and provided with forwardly projecting fianges each provided with serrations, a U- shaped locking member having flanges adapted to engage said serrations and also slidably mounted in said arms, a downwardly and rearwardly inclined plate secured between said arms and having a slotted flange at the bottom thereof, an operating member for the locking member having inclined side flanges adapted to engage the inclined plate and having a portion adapted to engage the locking member, and a bolt extending through the said slotvand threaded into the operating member.

13. In a chair, the combination, with opposite rearwardly-disposed arms, of a backsupporting post vertically adjustable between the said arms, a rear engaging member between the said arms, a plate adapted to engage the front of the postand having pivots slidably mounted in said arms and provided with a projection having serrations, a locking member adapted to engage engage theinclinecl plate and having a portion adapted to engage the locking member,

vand a bolt extending through the said slot andfthreaded into the operating member.

In In testimony whereof, signature.

EDWARD n. BUMP.

I hereunto uflix my 

